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Repellency and Attractancy of Several Plant Extracts against Rice Weevil,
Sitophilus oryzae (Coleoptera: Cucurlionidae)
Noorashikin binti Isahak
Supervisor: Dr. Nur Aida Binti Hashim
Bachelor of Science Agrotechnology (Postharvest Technology)
School of Food Science and Technology
Lantana camara, Ageratum conyzoides, Chromolaena odorata, Cyperus rotundus,
Eleusin Indica and Mikania micrantha are several plants that reported to have
insecticidal properties against Sitophilus oryzae. Bioassay test to determine repellency
was conducted using each plant methanolic and aqueous extracts. Filter papers were
cut into half and the plant extract was applied to one half. After 24h of drying the
treated and control half-disks were both place in the petri-dish. Twenty S. oryzae were
release at the centre of each filter paper. The numbers of S. oryzae were counted
after 1, 3 and 24 h of exposure. All six plant methanol extract after 24 hours exposure
of S. oryzae showed repellent effect while using aqueous extract there is several plant
extract as repellent or attractant. These result suggested that several plant extract
can be used as insect pest repellent in stored rice grain.
1045 | UMT UNDERGRADUATE RESEARCH DAY 2018